Top for jars.



G. R. KEERAN.

TOP FOR JARS.

APPLICATION FILED MAR.31,1909.

957,064. Patented May 3, 1910.

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' waxe PATENT OFFICE.

CHARLES R. KEERAN, OF BLOOMIHGTON, ILLINOIS.

'IOP FOR JARS.

Specification of Letters Patent.

Patented May 3, 1910.

' Application filed March 31, 1809. Serial No. 488,899.

To all whom it may concern:

Be it known that I, CHARLES R. KEERAN, a citizen of the United States, residing at Bloomington, in'the county of McLean and State of Illinois, have invented new and useful Improvements in Tops for Jars, of which the followin is a specification.

This invention re ates to a seal or closures for fruit jars and other bottles, jars and similar containers.

The main object of the invention is to provide a closure of the screw cap and sealing disk ty e in which an improved construction of seal is employed to hermetically close the bottle or jar without undue compression of the seal.

Another object is to provide a seal which is inexpensive of construction and free from the ob ections incident to the use of rubber seals, and which obviates the necessity of employing enameled or porcelain-lined caps in order to prevent corrosion, thus decreasing the cost of manufacture.

till another object is to provide a seal havin improved means for maintaining a disk out of contact with the cap, whereby the cap is prevented from becoming fastened to the jar by the wax and is adapted to be removed without first heating the jar to melt the wax.

In the accompanying drawin :Fi re 1 is a vertical section through t e nec of a jar showing the seal in position for application. Fig. 2 is a similar view showing the neck sealed by the seal and cap. Fig. 3 is a top lan view of a ortion of the ca partially roken away. ig. 4 is a sectiona view through the seal as em loyed in conjunction with a flanged guar r1ng.-

Referring to the drawing, 1 designates the -neck of a jar, bottle or other container having external screw threads 2, and 3 designates a metal cap having athreaded flan e 4 to engage said threads 2, above its threa s the flan e of the cap is formed with comparative y coarse external corrugations 5, providing a. milled grip for convenience in applying and removing the ca and which corrugations also serve an ad itional function, as hereinafter described. The construction of seal employed allows a cap having an open center top to be employed without detriment, 2'. e., a top having an opening 6 and consisting simply of a circular rim.

The seal employed in conjunction with the cap comprises an upper disk or liner 7 and a lower disk or liner 8. The disk 7 which forms a yielding backing for the disk 8, is formed of comparatively soft pulp board or its equivalent, while the disk 8 is composed of some soft porous material such as blotting paper saturated with sealing wax, nubber or any of the compositions of the latter which melt at a temperature somewhat higher than normal atmospheric tem erature. The disks 7 are coextensive in iameter with each other and with the internal diameter of the milled portion of the cap and external diameter of the rim edge of the neck 1. Both disks are thus adapted to fit snugly within the upper portion of the cap with the disk 7 bearing against and closing the opening'6 in the top of the cap, so that the disk 8 may restupon' the rim edge of the neck with the edges of both disks flush with the outer surface of said neck. To the under side of the disk 8 is secured a steam and water-proof disk 9 of oiled paper or any suitable material which is coextensive in diameter to the internal diameter of the neck and is adapted to fit within and bear peripherall a amst the same.

In use, t e preserved is poured while hot into the jar, the disks placed upon the edge of the neck as shown, the cap screwed on as far as it will go easily, and the jar allowed to stand a few minutes. The heat from the contents of the jar will soften the wax or other equivalent material saturating the disk 8, and then the cap is screwed on tightly thus embedding the rim of the neck in the waxed disk by which a perfect hermetic seal is secured. In this operation the disk 7 will also be caused to adhere to the disk 8 by the wax, and the latter named disk will adhere so stron 1y to the neck that the cap may be removef and the vessel inverted and roughly handledwithout breaking the seal.

uit on other substance to be i In '7 putting up cold goods, the waxed disk scribed, the necessity of com of the jar with the disk 8, and cooperates with the latter to form a more perfect seal. It will be observed that the disks 7 and 8 completely close the joint between the neck and cap, so that no portion of the contents of the jar can come into contact with the cap. Hence, the'necessity of employing an enameled or porcelain-lined 'cap'to prevent corrosion is obviated with resulting economy. By forming the outwardly projecting corrugations on the cap the edges of the disks are allowed to lie flush with the exterior of the. neck, so that they finally cover the rim edge thereof. Of course, this could be accomplished by making the cap smaller at the top and leaving off the corrugations. However, if this were done, when a wax seal is used the cap would become sealed so ti htly that it would almost defy removal without'heating, but even though some .of the wax will stick the edges of the disks 7 and 8 'to the inside oints of these corrugations the portions ,0 the wax will break loose much easier when it is desired to unscrew the cap. It will also be observed that by using a seal of the character deressing the seal to an objectionable degree y a very tight screwing on of the cap as is necessary in using ordinary pa er or rubber gaskets, is

and accordingly the cap may bemade of thinner metal and with an open center, as before described, as a very strong cap is not necessary. The cost of producing the cap is therefore decreased without impairing the strength of the seal.

-' cap maybe If desired the annular rim or top of the depressed by inclining it slightly downward toward-the. opening 6, as shown in Fig. 2, thus adapting it to more effectually confine the center of the seal and sus-. tain it against any internal pressure.

The name or trade-mark of the manufacturer or any desired printed matter may be suitabl arranged on the disk 7 for display throu the opening 6.-

If esired, a guard rin 10of metal or other preferred material may be provided to inclose the edges of the disks 7 and 8 said ring having an inturned flange 11 to project over upon the upper surface of the disk 7, so as to'prevent contact between said disks and the cap and sticking of the disks to the cap by the sealing wax or other material. This will obviate the necessit of heating the cap to soften the wax to a low the cap to be removed and enable. a cap without the corru ations to be used if so desired. Hence t e cap may be easily I screwed 011: and the seal cut away by a wax, when it mgl lly knife without min? or heated to soften the e easily removed. Having thus described the inventlon, what I claim as new is 1. A closure for receptacles comprising an inner sealing disk of compressible mate rial saturated with a sticky fusible material and adapted to'rest directly upon the rim of the receptacle, an outer sealing disk backing the same, and a cap to inclose said disks and ada ted to engage the receptacle.

2. A c osure for receptacles comprising a sealing disk of porous compressible material saturated with a sticky fusible substance, said disk adapted to rest directly upon the rim of the receptacle, and a cap to inclose said disk and adapted for engagement with a receptacle.

3. A closure for receptacles comprising an inner sealing disk of porous compressible material saturated with a sticky fusible substance, and adapted to rest directly upon the rim of the receptacle, an outer sealing diskof compressible material backing said inner disk, and a cap inclosing said disks and adapted for engagement wlth a recepv tacle. a I

4. A closure for receptacles comprising an inner sealing disk of porous compressible material saturated with a sticky fusible substance and adapted to rest directly upon the rim of the receptacle, an outer sealing disk of compressible material backing said' inner disk, a moisture-proof disk upon the inner face of said inner disk and of less diameter than the same, and a cap to inclose said inner and outer disks and adapted for engagement with a receptacle.

5. A closure for receptacles comprising a caphaving an open center top and a threaded flange, the wall of the top being inclined inwardly and downwardly, an inner disk of porous compressible material saturated with a sticky fusible material and adapted to fit within the cap and rest directly upon the rim of the receptacle, and an outer disk of compressible material adap the cap and to bear against said inclined wall.

6. A bottle seal comprising a cap having a flan e threaded at its lower portion and provi ed above the threads with annular corru ations, an outer sealing disk formed of so compressible material having its peripheral edge contacting with the corrugations, and an inner sealing disk coextensive in'diameter with said outer sealing disk and composed of a porous material saturated with a stickyfusible substance and adapted to rest directly 'upon the rim of the recepted to fit within ripheral edge contacting with the corrugations and an inner sealing disk coextenslve in diameter with said outer sealing disk and composed of a to rest directly upon the rim of the receptacle.

composed of a g with a sticky fusible substance and adapted to rest directly upon the rim ofthe recep waterproof disk secured to the lower face of sai inner sealing disk and of less diame- 'ter than the same.

9. A bottle seal comprising a cap havin a flange threaded at its lower portion an provi ed above the threads with annular corrugations, the top wall of the ca being formed with a central opening an being inclined inwardly and downwardl toward said opening, an outer sealin dis formed of soft compressible material aving its peripheral edge contacting with the corruga-,.

tions, an inner sealing disk coextensive in diameter with said outer sealing disk and porous mater a orous material saturated with a sticky fusible substance and adapted saturated tacle, and a water-proof disk secured to the lower face of said inner sealing disk and of less diameter than the same. f

10. A seal for receptacles comprising a cap containing a porous disk saturated with a usible material and a guard between said disk and the walls of the cap.

'11. A sea] for receptacles comprising a ca containinga orous disk saturated with a usible materia ,and a flanged guard between said disk and the walls of the cap.

12. The combination with a receptacle havin external screw threads, of a cap having a ange formed at its lower portion with engaging threads and between said threads and 1's crown portion with 'outstruck corrugations, a porous disk disposed within the cap and resting directly upon the rim of the receptacle and saturated with a sticky fusible. material, a second disk arranged between said porous-disk and the crown of the cap, said disks having their peripheral edges terminatin in line with the outer edge of the rim 0? the receptacle and arrangedto face the corrugations of the ca and a waterproof'disk on the under si e of the porous disk and disposed 'withinthe mouth of the receptacle.

In testimon whereof I aflix my signature in presence 0 two witnesses.

v CHARLES R. KEERAN.

Witnesses: 4 I

F; E. BAILEY, IRMA BUFFHAM. 

